The colors are very pleasing. The hands disappear on the fire colors in the standing poses though. There just isn't enough contrast between the white of the overalls and the tone of Mario's skin. I'm not really sure how to fix this as darkening Mario's skin would make his default color less effective and making the overalls darker than the skin tone would make them look like they'r either not white or they're in a different light than he is, which is not ideal. Maybe you should try darkening the skin just a little bit so that it's still bright against the dark overalls but darker against the white overalls.